#30004: Document TemporaryUploadedFile potential permission issues
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Reporter: Evgeny Arshinov | Owner: nobody
Type: Uncategorized | Status: new
Component: Documentation | Version: 2.1
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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Hello,
As far as I can see, the
[https://docs.djangoproject.com/en/2.1/topics/http/file-uploads/ File
Uploads] documentation page does not mention any permission issues.
What I would like to see is a warning that in absence of explicitly
configured `FILE_UPLOAD_PERMISSIONS`, the permissions for a file uploaded
to `FileSystemStorage` might not be consistent depending on whether a
`MemoryUploadedFile` or a `TemporaryUploadedFile` was used for temporary
storage of the uploaded data (which, with the default
FILE_UPLOAD_HANDLERS, in turn depends on the uploaded data size).
The `tempfile.NamedTemporaryFile` + `os.rename` sequence causes the
resulting file permissions to be 0o0600 on some systems (I experience it
here on CentOS 7.4.1708 and Python 3.6.5). In all probability, the
implementation of Python's built-in `tempfile` module explicitly sets such
permissions for temporary files due to security considerations.
I found mentions of this issue [https://github.com/divio/django-
filer/issues/1031 on GitHub], but did not manage to find any existing bug
report in Django's bug tracker.
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Ticket URL: <https://code.djangoproject.com/ticket/30004>
Django <https://code.djangoproject.com/>
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